Process of making acetyl-cellulose plastics.



No Drawing. 1 Application filed November 27, 191 1.

- involve,

'ment of solutlons or mixtures of ya in phor can be mixed e. trnnsar, or CALDWELL, coiuranv, on new "roan, n.

WILLIAM mini.

4 To all whom it moi} concern:

Be it known that I, WILLIAM G. LINDSAY, a citizen of the United States,residing in Caldwell, county of Essex, State of New Jersey, have invented certain new and use ful Improvements in Processes of Making Acetyl-Cellulose Plastics, of which the fol' lowing is a specification.

-The various compositions to which the present invention relates are employed in the arts, generally as imitations of natural substances, sometimes in their. original finished form with or without incorporated colors and other inert substances, and sometimes as films which are used for photographic and other purposes. is

' Although the finalo difl'erent compounds of acetyl cellulose is that of a solid material, the different proc esses of conversion into this final solid form as is well understood, the employconsistency as to plasticity, stifi'ness, or ui ity, depending generally upon the proportion and kind of solvent used to the amount of the original base-acetyl cellulose.

It has been known form a solvent for nitrocellulose in the cold or at room temperature and also that camwith the nitrocellulose and that the subsequent addition ofethyl alcohol causes solution or conversion of) the nitrocellulose, but the object of my invention was to find substances acetyl cellulose, would exert a solvent action upon the cellulose and produce a plastic mass which couldbe'worked in a manner anal ogous to nitrocellulose-camphor compounds.

I have discovered that acetyl cellulose of thevariety which is soluble in acetone can be made into plastic solids by the use of either tetrachlorethyl acetanilid or trichlormethyl acetanilid, or amixture of the two, in conjunction with ethyl alcohol in'substantially equal proportions of the solids, and the alcohol and that the solvent will convert the cellulose and render the, compound capable of being worked as in the case of the nitrocellulose-champhor plastic art.

As one example 'of' ractisin my invention, I take 100 parts an acetyl eel ulose of the variety which is soluble in acetone and incorporate it by mixing, grinding, or otherwise,'with parts ofeither tetrachlorethyl i 7 Specification of Letters Patent.

, soak 'order to give good r useful form of the and subsequently dried still under pressure. I v j It will of course be understood by those for many years that camphor and ethyl alcohol in admixture incorporated in which, when added; to a a. small NEW JERSEY, ASSIGNOR TO THE CELLULOID Y A. CORPORATION OF NEW JERSEY.

PROCESS OF MAKING ACETYL-CELLULOSEPLASTICS.

Patented lFfih. 2U, 19h 'Y Serial No. 662,747.

acetanilid or trichlormethyl acetanilid, or a mixture of the two. I th mixture with from 40 to alcohol by stirring and allow the mass to or macerate at room temperature in a closed vessel, say, from 12 to 30 hours in penetration. The mixture is then placed in asteam jacketed mixmg machine or a (t e degree of heat bein -100 '0.) and after thorough mixing un er the influence of-heat the resultant mass is then pressed in s'uitableforms or presses so as to form blocks or cakes while stilli nder the influence of heat, and then after cooling, these blocks or cakes can be cut into sheets or other-shapes or. seasoned in'the manner analogous to that practised in the nitrocellulose plastic art. Or, if desired, the plastic heated mass'can be pressed in heated molds ofthe desired shape of the final roden incorporate the boiling hot water bath 5() parts of ethyl V not and subsequently cooled and drie ,but,

skilled inthe art'that the order of mixing. the various ingredients of the compound canbe changed if 'desired and that coloring matters and other inert substances may be the compound, audit also be understood by the operator that slight variations in the proportions of the ingredients named mayioccur intentionally or designedly, without departing from the sp rit of my invention.

3 Among the chlorinated alkyll acetanilids usable 111 my process are tetir'achlorethyl acetanilid and trichlormethyl y acetanilid,

both of which when melted are a solvent for acetyl. cellulose and which in the presence of ethyl alcohol are a non-solvent for acigyl cellulose at room temperature.

aving' thus described my invention, what I claim is p 1. The process of making acetyl cellulose plastic masses which QOIIIPI'ISBS 1ncorporatmg an acetone-soluble'acetyl cellulose .withtetrachlerethyl acetanilid in the resen'ce of proportion of ethyl ,al

heating.

2:The process of making. acetyl cellulose plastic masses whlch comprises incorporat-' mg an acetone-soluble acetyl cellulose with a chlorinated alkyl acetanllid in the pres-.110

001161 and 1 65 I enceof a small proportion of ethylulcohol, and heating, saidchlorinated 1alkylfacetanilid when melted being a solvent for; acetyl cellulose and when in the presence of ethyl alcohol being a non-solvent for acetyl cellulose at room temperature. I

' -3. The'p'rocess of making acetyl cellulose plastic masses which comprises incorporating an acetone-soluble-acetyl cellulose with tetrachlorethyl acetanilid in the presence of a small roportion of ethyl alcohol and heating, 't e proportionof the alcohol being about 1 dient;

a s, a

.to 1% times the acetanilid ingre- 4."-The process of makingacety plastic masseswhich comprises incorporatmg an a? ch lid when melted being a solvent .'cellulose. and when in' the presence of ethyl 'alcohol being a non-solvent forv acetyl cel- I I tetrachlorethyl acetan illd in the presence of acetone-soluble acetyl cellulose with 'nated alkyl acetanilidin the pres- .ence ofa smallproportion of ethyl alcohol,

and heating,- said chlorinated alkyl acetanifor acetyl lulose at room temperature, the proportion of the alcohol being about 1' to'L} times the a'cetanilid ingredient. s

i 5. The process of making acety plastic masses which comprises incorporatan acetone-soluble acetyl cellulose with l cellulose ing 1 cellulosea small proportion heating, the proportion of the alcohol being about 1 to 1% times the acetanilid ingredient, and the latter being less than one-half the acetyl cellulose ingredient.

6. The process of making acetyl cellulose plastic masses which comprises incorporatmg a chlorinated alkyl acetanilid in the presence of a small proportion'of ethyl alcohol, and heating, said chlorinated alkyl acetanilid when melted being a solvent for acetyl cellulose and when in the presence of ethyl alcohol being a non-solvent for acetyl cellulose at room temperature, the-proportion of ethyl alcohol; and Y an acetone-soluble acetyl cellulose with of the alcohol being about .1 to 1% times the I 

